Roller gin



Dec. 1, 1970 E a MALKQV 3,543,350

ROLLER GIN Filed Dec. 4, 1967 United States Patent 3,543,350 ROLLER GINEmanuil Borisovich Malkov, Tashkent, U.S.S.R., assignor to TsentralnyNauchno-Issledovatelsky Institut Khimicheskoi Promyshlennosti, Tashkent,U.S.S.R.

Filed Dec. 4, 1967, Ser. No. 687,640 Int. Cl. D01b 1/06 U.S. Cl. 19-50 1Claim ABSTRACT OF THE DISCLOSURE A roller gin is provided in which seedis separated from fiber by a leather roller, a separation roller and astationary knife, the seed dropping through a screen located under asecond saw tooth feed roller, while the separated fiber is cleaned by asecond saw tooth roller which cards the fiber and a stripper for the sawtooth roller.

The present invention relates to devices for processing raw cotton and,more particularly, to roller gins designed to separate fiber from seedsin fine-fibrous cottons.

Prior art roller gins comprise a leather roller, a stationary knife, aseparation device and an arrangement for loosening raw cotton and forfeeding same to the leather roller.

The main disadvantage of prior art roller gins is the low quality of theproduced fiber caused by the presence of impurities, abortive seeds andflaws, which adversely affect further processing the fiber in textilefactories.

It is an object of the present invention to provide for cleaning thefiber of impurities, flaws and abortive seeds.

Also an important object of the invention is to improve the quality ofproduced fiber. Still another object of the invention is to improve theexterior (merchantable) appearance of the fiber.

In the accomplishment of said and other objects, in a roller ginaccording to the invention comprising a leather roller, which cooperateswith a stationary knife, and a separation device, there is mounted anarrangement for cleaning the fiber delivered directly from the leatherroller.

It is advisable that said arrangement for cleaning the fiber befashioned as a saw-tooth roller, with grates embracing part of thelatter roller surface, at least a pair of rollers for the delivery offiber separated from seeds to the saw-tooth roller, and a stripper offiber from the saw-tooth roller.

For a better understanding of the invention there is given hereinbelow adescription of an exemplary embodiment thereof, reference being had tothe accompanying drawing which diagrammatically shows the roller ginaccording to the present invention.

Referring to the figure, the roller gin comprises: a pair of feedrollers 1 adapted to uniformly deliver raw cotton to a spiked roller 2,which effects the loosening of raw cotton and the separation therefromof impurities falling through a screen 3 into a bunker 4; atwine-trapping means 5 adapted for trapping pieces of twine and cordwhich may be accidentally fed to the machine together with raw cotton; achute 6 directing raw cotton towards a sawtooth cylinder 7, designed tointensively and uniformly deliver raw cotton to a leather roller 8; aseparation roller 9 and a stationary knife 10, adapted for theseparation of fiber from seeds; and an arrangement for cleaning thefiber delivered from the leather roller 8. The arrangement for cleaningthe fiber of impurities, abortive seeds and flaws comprises: a saw-toothroller 11 for carding the fiber, grates 12 embracing part of the surfaceof the sawtooth roller, at least a pair of ribbed rollers 13 for squeez-"ice ing the fiber separated from seeds and for delivering same to thesaw-tooth roller 11, and a stripper 14 for fiber from the saw-toothroller.

The saw-tooth cylinder 7 is made as a roller coated with card clothing;it may also be made as a roller composed of separate saw-tooth discs.

To ensure a uniform delivery of raw cotton to the leather roller 8provision is made for a levelling roller 15 and an accelerating roller16. The roller 16 is designed to remove raw cotton from the teeth of thesaw tooth cylinder 7 and to deliver it to the ginning device. Theseparation device separates the seeds from the fiber and delivers them,together with complete and partly ginned raw-cotton, along the chute tothe saw tooth cylinder 7 under which a perforated screen 17 is placed.As the saw tooth cylinder 7 rotated, the mixture moves along the screen17. Exposed seeds and impurities fall through the openings of the screenwhile complete and partly ginned raw-cotton is caught by the teeth ofthe saw tooth cylinder 7 and returned to the ginning device; thisprocedure is repeated until the seeds are completely removed. The screen17 can be made with round holes. To attain more intensive separation ofexposed seeds, large-size impurities and other foreign bodies, it isadvisable that the openings in the screen under the saw-tooth cylinder 7be elongated in shape and a continuous chute be placed under theseparation roller 9. The saw-tooth roller 11 is made as a roller withcard clothing; it may be also be made as a saw-tooth cylinder composedof separate discs. For better carding of the fiber and holding the sameon the saw teeth, provision is made of a brush 18. Impurities, fiberwaste and seeds are removed from the roller gin with the aid of a beltor screw conveyer (not shown in the drawing).

Upon being stripped, the fiber is transported by means of compressed airalong the fiber outlet (not shown in the drawing) to a location where itis pressed into bales.

The roller gin according to the present invention operates as follows.

Raw cotton is fed by the feed rollers 1 onto the spiked roller 2, whereit is loosened and is further directed to the twine-trapping means 5,from Which its travels, along the chute 6, to the saw-tooth cylinder 7.The latter effects a uniform delivery of raw cotton to the leatherroller 8, where fiber i separated from seeds with the aid of theseparation roller 9 and the stationary knife 10. The fiber moves along achute 19 to the pair of ribbed rollers 13, which feed it to thesaw-tooth roller 11. The latter cards the fiber, beats it on the grates12, whereupon the cleaned fiber is stripped otf the saw teeth with theaid of the stripper 14. Impurities, abortive seeds and fibrous wastefall from under the saw-tooth roller 11 in the spacings between thegrates 12, while exposed seeds separated from fiber fall through thescreen 17.

I claim:

1. A roller gin comprising: at least one pair of rollers rotatablymounted on a frame to deliver raw-cotton; a spiked roller disposeddirectly under said rollers to partially loosen the raw-cotton deliveredfrom said rollers; means for the removal of impurities comprising aperforate screen mounted directly under said spike roller; atwine-trapping means mounted adjacent said spiked roller downstream inthe course of travel of the'cotton; a vertical guiding chute disposedafter said twine-trapping means; a saw tooth roller at the bottom ofsaid chute receiving raw-cotton from said chute; means for theseparation from the fiber of seeds mounted downstream of said saw toothroller; means for the removal of exposed seeds from under said saw toothroller comprising a perforate screen directly under said toothed roller;means for cleaning the fiber separated from seeds, mounted close to saidmeans for the separation of seeds from fiber and References Cited UNITEDSTATES PATENTS 888,396 5/1908 Gardner 19-35 7/1912 Mitchell 19-61 XR2/1920 Conrad 19--37 6/1934 Mitchell 19-37 11/1937 Mitchell 1935 5/1966Vandergrilf 1950 XR 5/1956 Speakes et a1. 19--66 5/1956 Wallace 19203FOREIGN PATENTS 6/ 1966 U.S.S.R. 8/1960 U.S.S.R.

DORSEY NEWTON, Primary Examiner

